Super Greg is actually a fictional character created by the Fallon ad agency for a Lee jeans ad campaign. Super Greg's "personal" web page (www.supergreg.com -- which no longer exists) was a viral marketing component to the campaign. Supposedly the Super Greg page was originally created by Fallon without Lee's permission (something I find hard to swallow). It was an obvious attempt to cash in on the Mahirinsta-fame phenomenon.

See also:Curry and Roy (two other "people" invented for the same ad campaign)